Power supply apparatus with function for correcting for erroneous detection
First Claim
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1. A power supply apparatus comprising:
- a battery that is composed of n, where n is an integer equal to or greater than 2, battery modules connected in series;
a voltage detection circuit that detects voltages of the individual battery modules of the battery; and
an electronic control unit that controls charging and discharging of the battery based on the voltages of the individual battery modules as detected by the voltage detection circuit,wherein the voltage detection circuit comprises;
a voltage detector that detects relative voltages between a predetermined reference node within the battery and each of nodes between the battery modules connected in series;
an erroneous detection checker that checks whether each of the relative voltages detected by the voltage detector is an erroneously detected voltage or a normally detected voltage; and
a calculation circuit that calculates the voltages of the individual battery modules based on the relative voltages judged to be normally detected voltages,wherein, if one of the nodes is recognized as an erroneous detection node as a result of the corresponding relative voltage being judged to be an erroneously detected voltage by the erroneous detection checker, the calculation circuit calculates, based on the relative voltages detected at the two nodes located adjacently on positive and negative sides of the erroneous detection node, a recovery voltage for the erroneous detection node, and then, by replacing the relative voltage detected at the erroneous detection node with the recovery voltage, calculates the voltages of the battery modules.
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Abstract
A power supply apparatus has a battery that is composed of a plurality of battery modules connected in series, a voltage detector that detects the relative voltages at the individual nodes between the battery modules with respect to a predetermined reference node, an erroneous detection checker that checks whether each of the detected relative voltages is an erroneously detected voltage and a normally detected voltage, and a calculation circuit that calculates the voltages of the individual battery modules based on those relative voltages that are judged to be normally detected voltages. If any of the nodes is recognized as an erroneous detection node as a result of an erroneously detected voltage being detected thereat, the calculation circuit calculates, based on the relative voltages detected at the two nodes located adjacent to the erroneous detection node, a recovery voltage, and then, by replacing the relative voltage detected at the erroneous detection node with the recovery voltage, calculates the voltages of the battery modules.
14 Citations
17 Claims
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1. A power supply apparatus comprising:
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a battery that is composed of n, where n is an integer equal to or greater than 2, battery modules connected in series; a voltage detection circuit that detects voltages of the individual battery modules of the battery; and an electronic control unit that controls charging and discharging of the battery based on the voltages of the individual battery modules as detected by the voltage detection circuit, wherein the voltage detection circuit comprises; a voltage detector that detects relative voltages between a predetermined reference node within the battery and each of nodes between the battery modules connected in series; an erroneous detection checker that checks whether each of the relative voltages detected by the voltage detector is an erroneously detected voltage or a normally detected voltage; and a calculation circuit that calculates the voltages of the individual battery modules based on the relative voltages judged to be normally detected voltages, wherein, if one of the nodes is recognized as an erroneous detection node as a result of the corresponding relative voltage being judged to be an erroneously detected voltage by the erroneous detection checker, the calculation circuit calculates, based on the relative voltages detected at the two nodes located adjacently on positive and negative sides of the erroneous detection node, a recovery voltage for the erroneous detection node, and then, by replacing the relative voltage detected at the erroneous detection node with the recovery voltage, calculates the voltages of the battery modules. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power supply apparatus comprising:
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a battery that is composed of n, where n is an integer equal to or greater than 2, battery modules connected in series; a voltage detection circuit that detects, voltages of the individual battery modules of the battery; and an electronic control unit that controls charging and discharging of the battery based on the voltages of the individual battery modules as detected by the voltage detection circuit, wherein the voltage detection circuit comprises; a voltage detector that detects relative voltages between a predetermined reference node within the battery and each of nodes between the battery modules connected in series; an erroneous detection checker that checks whether each of the relative voltages detected by the voltage detector is an erroneously detected voltage or a normally detected voltage; and a calculation circuit that calculates the voltages of the individual battery modules based on the relative voltages judged to be normally detected voltages wherein, if consecutive C, where C is an integer equal to or greater than 2 and fulfilling C≦
n−
1, of the nodes are recognized as erroneous detection nodes as a result of the corresponding relative voltages being judged to be erroneously detected voltages by the erroneous detection checker, the calculation circuit calculates, based on the relative voltages detected at the two nodes located adjacently on positive and negative sides of a node group consisting of the C erroneous detection nodes, recovery voltages respectively for the C erroneous detection nodes, and then, by respectively replacing the relative voltages detected at the erroneous detection nodes with the recovery voltages, calculates the voltages of the battery modules. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A power supply apparatus comprising:
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a battery that is composed of n, where n is an integer equal to or greater than 2, battery modules connected in series; a voltage detection circuit that detects voltages of the individual battery modules of the battery; and an electronic control unit that controls charging and discharging of the battery based on the voltages of the individual battery modules as detected by the voltage detection circuit, wherein the voltage detection circuit comprises; a voltage detector that detects relative voltages between a predetermined reference node within the battery and each of nodes between the battery modules connected in series; an erroneous detection checker that checks whether each of the relative voltages detected by the voltage detector is an erroneously detected voltage or a normally detected voltage; and a calculation circuit that calculates the voltages of the individual battery modules based on the relative voltages judged to be normally detected voltages, wherein, if one of the nodes is recognized as an erroneous detection node as a result of the corresponding relative voltage being judged to be an erroneously detected voltage by the erroneous detection checker, the calculation circuit calculates, based on a voltage difference between the relative voltages detected at the two nodes located adjacently on positive and negative sides of the erroneous detection node, the voltages of two battery modules adjacent to the erroneous detection node. - View Dependent Claims (14)
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15. A power supply apparatus comprising:
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a battery that is composed of n, where n is an integer equal to or greater than 2, battery modules connected in series; a voltage detection circuit that detects voltages of the individual battery modules of the battery; and an electronic control unit that controls charging and discharging of the battery based on the voltages of the individual battery modules as detected by the voltage detection circuit, wherein the voltage detection circuit comprises; a voltage detector that detects relative voltages between a predetermined reference node within the battery and each of nodes between the battery modules connected in series; an erroneous detection checker that checks whether each of the relative voltages detected by the voltage detector is an erroneously detected voltage or a normally detected voltage; and a calculation circuit that calculates the voltages of the individual battery modules based on the relative voltages judged to be normally detected voltages, wherein, if consecutive C, where C is an integer equal to or greater than 2 and fulfilling C≦
n−
1, of the nodes are recognized as erroneous detection nodes as a result of the corresponding relative voltages being judged to be erroneously detected voltages by the erroneous detection checker, the calculation circuit calculates, based on a voltage difference between the relative voltages detected at the two nodes located adjacently on positive and negative sides of a node group consisting of the C erroneous detection nodes, the voltage of each of a total of (C+1) battery modules adjacent to every erroneous detection node. - View Dependent Claims (16, 17)
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Specification
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Current AssigneeSanyo Electric Company Limited (Panasonic Holdings Corporation)
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Original AssigneeSanyo Electric Company Limited (Panasonic Holdings Corporation)
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InventorsYoshihara, Ryuji, Furukawa, Kimihiko, Hashimoto, Eiichiro
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Primary Examiner(s)Berhane; Adolf
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Assistant Examiner(s)DIAO, M BAYE
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Application NumberUS11/095,667Publication NumberTime in Patent Office1,187 DaysField of Search320110-116, 320/155, 320/132, 320119-120, 320/124, 320/127, 320/118US Class Current320/116CPC Class CodesH02J 7/0013 acting upon several batteri...H02J 7/0048 Detection of remaining char...
